#!/bin/sh
# $Revision: 369 $
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# (c) Tim Brown, 2012
# <mailto:timb@nth-dimension.org.uk>
# <http://www.nth-dimension.org.uk/> / <http://www.machine.org.uk/>
#
# Supports: Linux

if [ -z "${deviceincluded}" ]
then

deviceincluded=1

. lib/misc/file
. lib/misc/validate

device_fstab_check () {
	if [ "`file_is_readable \"/etc/fstab\"`" -eq 1 ]
	then
		printf -- "1\n"
	else
		printf -- "0\n"
	fi
}

device_fstab_list () {
	if [ "`device_fstab_check`" -eq 1 ]
	then
		cat "/etc/fstab" | egrep -v "^#|^$" | while read device mountpoint filesystem options _ _
		do
			if [ -n "`printf -- \"${device}\" | egrep -- \"^/\"`" ]
			then
				printf -- "${device}\n"
			fi
		done | sort | uniq
	fi
}

device_mounted_list () {
	if [ "`uname`" = "SunOS" ]
	then
		mount | egrep -- "xattr" | while read device _ mountpoint _ filesystem options
		do
			if [ "`printf -- \"${device}\" | egrep -- \"^/\"`" ]
			then
				printf -- "${device}\n"
			fi
		done | sort | uniq
	else
		mount | while read device _ mountpoint _ filesystem options
		do
			if [ "`printf -- \"${device}\" | egrep -- \"^/\"`" ]
			then
				printf -- "${device}\n"
			fi
		done | sort | uniq
	fi
}

device_blkid_list () {
	[ "`file_show_real_filename \"blkid\"`" ] || false
	blkid="`file_show_real_filename \"blkid\"`"
	blkid -o device | while read device
	do
		printf -- "${device}\n"
	done | sort | uniq
}

device_swap_list () {
	# TODO does uname return HP-UX or HPUX?
	if [ "`uname`" = "HP-UX" ]
	then
		swapinfo | egrep -v "^dev" | egrep -- "^/" | while read _ _ _ _ _ _ _ _ device _
		do
			printf -- "${device}\n"
		done | sort | uniq
	else
		swapon -s | egrep -- "^/" | while read device _ _ _ _
		do
			printf -- "${device}\n"
		done | sort | uniq
	fi
}

device_list () {
	device_mounted_list
	device_fstab_list
	device_blkid_list
	device_swap_list
}

device_list_options () {
	if [ "`device_fstab_check`" -eq 1 ]
	then
		cat "/etc/fstab" | egrep -v "^#|^$" | while read device mountpoint filesystem options _ _
		do
			# retrieve device file path from UUID representation
			if [ -n "`printf -- \"${device}\" | egrep -- \"^UUID=\"`" ]
			then
				uuid="`printf \"${device}\" | cut -c6-`"
				device="`device_uuid_to_filename \"${uuid}\"`"
			# ignore swap
			elif [ "${filesystem}" = "swap" ]
			then
				continue
			fi
			printf -- "${device} ${options}\n"
		done
	fi
}

device_get_mountpoint_from_blkid () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	[ "`file_show_real_filename \"blkid\"`" ] || false
	blkid="`file_show_real_filename \"blkid\"`"
	#blkid -o list | while read device filesystem label mountpoint uuid
	blkid -o list | while read device filesystem mountpoint uuid
	do
		if [ "${device}" = "${pattern}" ]
		then
			printf -- "${mountpoint}\n"
		fi
	done
}

device_get_mountpoint_from_fstab () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	if [ "`device_fstab_check`" -eq 1 ]
	then
		cat "/etc/fstab" | egrep -v "^#|^$" | while read device mountpoint filesystem options _ _
		do
			if [ "${device}" = "${pattern}" ]
			then
				printf -- "${mountpoint}\n"
			fi
		done
	fi
}

device_get_mountpoint_from_mount () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	mount | egrep -- "^${pattern}" | while read device _ mountpoint _ _ _
	do
		if [ "${device}" = "${pattern}" ]
		then
			printf -- "${mountpoint}\n"
		fi
	done
}

device_get_mountpoint () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	if [ -n "`device_get_mountpoint_from_mount \"${pattern}\" | egrep -- \"^/\"`" ]
	then
		printf -- "`device_get_mountpoint_from_mount \"${pattern}\" | egrep -- \"^/\"`\n"
	elif [ -n "`device_get_mountpoint_from_fstab \"${pattern}\" | egrep -- \"^/\"`" ]
	then
		printf -- "`device_get_mountpoint_from_fstab \"${pattern}\" | egrep -- \"^/\"`\n"
	elif [ -n "`device_get_mountpoint_from_blkid \"${pattern}\" | egrep -- \"^/\"`" ]
	then
		printf -- "`device_get_mountpoint_from_blkid \"${pattern}\" | egrep -- \"^/\"`\n"

	fi
}

device_uuid_to_filename () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	[ "`file_show_real_filename \"blkid\"`" ] || false
	blkid="`file_show_real_filename \"blkid\"`"
	#blkid -o list | while read device filesystem label mountpoint uuid
	blkid -o list | while read device filesystem mountpoint uuid
	do
		if [ "${uuid}" = "${pattern}" ]
		then
			printf -- "${device}\n"
			break
		fi
	done
}

device_is_swap () {
	pattern="${1}"
	[ "`validate_is_string \"${pattern}\"`" ] || false
	ret="0"
	device_swap_list | while read device
	do
		if [ "${device}" = "${pattern}" ]
		then
			ret="1"
			break
		fi
	done
	printf -- "${ret}\n"
}

fi
